From b236a9cb3ecf93dd2c2667e99c5ff2ebe18cc37a Mon Sep 17 00:00:00 2001
From: "Charles J. Cliffe" <cj@cubicproductions.com>
Date: Tue, 18 Aug 2015 19:21:31 -0400
Subject: [PATCH] fix for spectrum disconnect after zooming in/out

---
 src/visual/WaterfallCanvas.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/visual/WaterfallCanvas.cpp b/src/visual/WaterfallCanvas.cpp
index c2571d7..1a5958e 100644
--- a/src/visual/WaterfallCanvas.cpp
+++ b/src/visual/WaterfallCanvas.cpp
@@ -161,7 +161,13 @@ void WaterfallCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
 
         if (spectrumCanvas) {
             if ((spectrumCanvas->getCenterFrequency() != centerFreq) || (spectrumCanvas->getBandwidth() != bw)) {
-                spectrumCanvas->setView(centerFreq,bw);
+                if (getViewState()) {
+                    spectrumCanvas->setView(centerFreq,bw);
+                } else {
+                    spectrumCanvas->disableView();
+                    spectrumCanvas->setCenterFrequency(centerFreq);
+                    spectrumCanvas->setBandwidth(bw);
+                }
             }
         }
     }